3 Pack Hadron designs "Hot Lips" mk23 magazine replacement/upgrade feed lips.
 
NEW
We have spent considerable time with this new part.
Testing, developing, and thanks to our thorough testing team.. gaming (between lockdown lifts).
 
Hot Lips..
New design to both internal and external features, including a free flow exit path for the the bb
Magazine can be loaded via lips, or usual bottom of magazine area.
Nice bright colour, which helps locating dropped mags in the wild.
Manufactured in tough nylon material.
 
Fitment..
These lips can be fitted to all NBB mk23 magazines, STI, ASG, Novritch, and TM etc. 
 
Installation video :-
https://www.youtube.com/watch?v=k3_xLs3vBm8
 
Nozzle modification video:-
https://www.youtube.com/watch?v=K8hHxzHybEk
 
Note :- We found a massive variation in Mk23 loading nozzle dimensions over all models, Mk23 nozzle return spring strength, plus, variations in magazine casting/moulding. On some occasions shortening of the BB pusher by 0.6 to 0.8mm is required (STI and ASG new models are more common for requiring this).
Each MK23 Hot lip may have a small amount of post processing. This will show as a white mark internally, where polished. Do not be alarmed, as this colour change is local to that immediate area. Please see internal image above for clarification.